25% of the people have a 4th cone and see colors as they are ;p
The color nuances we see depend on the number and distribution of cones (=color receptors) in our eye. You can check this rainbow: how many color nuances do you count?
You see less than 20 color nuances: you are a dichromats, like dogs, which means you have 2 types of cones only. You are likely to wear black, beige, and blue. 25% of the population is dichromat.
You see between 20 and 32 color nuances: you are a trichromat, you have 3 types of cones (in the purple/blue, green and red area). You enjoy different colors as you can appreciate them. 50% of the population is trichromat.
You see between 33 and 39 colors: you are a tetrachromat, like bees, and have 4 types of cones (in the purple/blue, green, red plus yellow area). You are irritated by yellow, so this color will be nowhere to be found in your wardrobe. 25% of the population is tetrachromat.
Entire Article Here
Online Color Challenge
Inside a Camera at 10,000fps – The Slow Mo Guys
The Slow Mo Guys
Published on Jan 29, 2015
Gav shows you how insanely quick the inside of a DSLR camera moves when it takes a picture, by filming it at 10,000 fps.
Follow on Twitter – https://twitter.com/GavinFree
Camera filmed is a Canon 7D.
This video is a good demonstration of how a rolling shutter works.
Shot with a Phantom Flex at 10,000fps
Ken Duncan is a believer, and one of my favorite photographers.
Great song, great photography!!!!!!!
It’s still not the same as actually standing there in complete awe, but this particular video is one of the best ways to experience the northern lights without being there. Get’s really good at minute-5. Great to see the reaction of the two Hawaiian women too.
Also: “huge fireball that goes across the sky at 31:57!”
Minute-5!Live Northern Lights from Sirius Sled Dogs
What the aurora looks like from above Earth!
Aurora, Northern Lights, Flyover in HD, International Space Station
Published on Nov 2, 2014
Aurora australis and aurora borealis (northern lights) as viewed from the International Space Station. Auroras are caused by charged particles entering the atmosphere from above causing ionisation and excitation of atmospheric constituents as they collide with the earth’s magnetic field.
This video was compiled using time lapse footage shot from the International Space Station obtained courtesy of the Earth Science and Remote Sensing Unit, NASA Johnson Space Centre.
Into the Visual Wilderness | Go Outside and Play
This Adams Retouching Machine Helped Old School ‘Photoshoppers’ Touch Up Negatives by Hand
Last week we shared an example of beauty retouching that was done by hand in the early 1900s. …
While this machine wasn’t used for the Joan Crawford photo — the Adams machine was patented in 1947….
The machine, which holds negatives measuring up to 8×10 inches, works by vibrating the negative while the retoucher works on it with a dye brush or retouching pencil. The tiny movements help smooth out the strokes, allowing for clean and (hopefully) undetectable modifications to the negative.
This type of work required a steady hand, a sharp eye, and a great deal of time and patience. Edits on single images could take many hours to complete (the Crawford photo required six hours without the help of this machine).
Entire Article Here
Only 1-minute long, shows what it’s like to try to photograph humpback whales bubblenet feeding, while listening to their communications through the hydrophone!
I’ve never tried this, but this is actually really amazing, especially when knowing the coordination that’s going on among the whales to fish a school of fish this way! The fisheye lens makes them look further away than they really are.
Humpback whales bubblenet feeding in Alaska
Kimberly Tripp Randal
Published on Aug 15, 2014
This is NOT the best video overall… the real point of this video is to show you how truly hard it is to know where these guys are going to pop up. The coolest part is the sound (from the hydrophone)!
We were in Chatham Strait – just south west of Juneau, Alaska and we were in search of humpback whales who were bubblenet feeding. This cooperative feeding technique is not only unique to humpbacks but also only exhibited by a small number of those that cruise the inside passage of Alaska. Only around 70 of the 20K humpbacks even do this… when they break the surface it’s incredible not only to see but to hear (especially the calls and song as they prepare – Jon had a hydrophone)! There’s a caller, there are bubblers, there are pec flappers (who use the whites of their pectoral fins to help scare / herd the herring into a tighter ball) – they all have a role. But when they break the surface – incredible!
In this video, you can hear their calls (through the hydrophone) and see how difficult it is to predict where they will come up!
If you want to learn a bit more and see some great video as they emerge – check out:http://video.nationalgeographic.com/v…